Mold for concrete walls



T. E. ERDMNN MOLD FOR CONCRETE. WALLS I Fild July lO 1922 2 Sheets-Sheet l Nov. 20,1923

T, E. EFDMANN I MOLD FOR CONCRETE WALLS a sheets-sheet 2y Filed July l0. 1922 7 W 7, W k f y, m

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Arromvgr Patented Nov. 20, 1923.`

'rnnononn E. ERDMANN, or MINNEAPOLIS, MINNESOTA. i

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target? i MOLD non ooivonnrnfwnrgns.

, Application filed July 10,

` Minneapolis, in the county of Hennepin and A ci State of' Minnesota, have invented certain new and useful Improvements in Molds for Concrete Walls, of which thefollowingis a specification.

My invention relates to forms for concrete construction and more particularlyY to iorms for conveniently and rapidly/putting up hollow walls or partiti-ons.

The object is to provide a simple device by means of which a concrete Wall, whether single or double, can ber built up in horizontal layers, the device being moved as :tast as the hardening of the concrete will permit.

In the accompanying drawings;

Fig. 1 is a top view of'two of my devices, one tor Straight walls and the-other `for corners of walls, showing them appliedon'a wall in the process of being built and the wall being or' the hollow type.

Fig. 2-is an enlarged top view of the right hand portion of the straight wall device in Fig. 1.

Fig. 3 is an enlarged sectional elevation as on line 3-3vin Fig. 1 and comprises also an end view oi' Fig. 2 with the concrete Wall added.

Fig. 4 is an` enlarged sectional detail as on line 4-11' in Fig. 3. Fig is a detail elevation of thesliding beamlevers illustrated in Fig. 3 but `seen from the' opposite sideV and Y omitting the lower integralparts thereof.

F ig. 6 is an enlarged sectional elevation about as on line 6-.6 in Fig. 1, the wallbeing omit-ted. Y

F'g. 7 is4 a enlarged sectional elevation as online 7-.7 in Fig. G.

, Fig. '8 is air-enlarged sectional view as on v line. S-S in Fig. `3.

' Fig. 9 is a sde 'eleva-tion of one end of the straight wall building part of my invention 1 slightly inodiliedA for building up wallswith slanting edges' poses.` i

[It will first be notedtliat my device comprises primarily, means -for building hollow for gablcs and' similar purconcrete` walls; straight walls and corners alike beingI built up on the same principle viz; 'a hollow collapsibleA core and an outer and innerl wall, allheld together in parallel spaced relation while the concrete is poured,

wardly 1922. semaine. 574,@96. 'l

and readily removable by means to be de? scribed, when they concrete has hardened enough to. permit such removal.

. Referring tov thedlawing by reference numerals, 10 is the oundation'ot abuilding upon which a hollow wall comprising vparallel wall members 11 with a continuous air space 12 between them. The onlyelement i traversing said" air space ispret'erably a number of'crossbars 13 laidacross said space and in the top surface of the previ-- ously laid layer ofconcrete, to provide a rest for my device (see Figs. land 3) l `My device comprises, -ior straightdwall building7 an elongated frame Withan outopening, horizontally arranged, channel shaped member 14, a similar jinwardly opening memberl spaced parallel to member 14, and a central, elongated, c ol-l I 75 channel members with thelr tlangesfnorlapsible -core- 16-17 which are identical end secured yto a' transversely arranged beam above the channel members' and which will now de described. f Each beam comprises two slidably con'- nected parallel bars 23 23"*v (see F igs. 3 and 5) connected by shoulder bolts 24-25 both havingcountersunk heads. The bolt 24 (at left in Figs. 2 and`3) is secured' in' bar 23 95 and is slidable4 in a horizontally arranged slot 26 in bar 235 andcarries a collarj27 be-4 tweenfthe nut 28 and-its shoulder adjacent thebar 23X. I BoltV 25' is secured in the opposite Vend oit the bea-m in bar 23X and en` 109 gages in a similar slot 29 in Ibar 23 and held inplace by a nut 30'., y VIn Fig. 4I have shown one of the yokes 22 'securing' vbarulS to channelmember '14( by means of' a cotterpin 31inserted in reg= 105 istering apertures in the yoke and the bar.`

In.v Figs. 2, 3 and`5 isbest shown how the frame bars 19-20 have their horizontalportionssecured to the beam section 23 by bolts 32 and 33, respectively, the channel?inem#v "-0 to beam section 23 and holding the channel members 14 and 17 respectively, in

proper' spaced relation. Bar 19 has its horizontal portion extended inwardly and at its inner end I Julcrum at 86 a hand lever 37 (see Figs. 1, 2, 3 and 5) and at a certain predetermined point as 38, on said lever 37 I secure pivotallyl one end of a connecting rod 39 whose other end is pivotally secured on the previously described shoulder bolt 35 secured in beam member 23X. `Thus the fulcrum end of the hand lever is directly connected to the beam 23 and its channel mem.- bers 15 and 16 and the connectingrod 39 is directly connected to beam member 23X and its channel members 14 and 17. In Fig. 3 the hand lever position (in full lines) shows the channel members in position to permit pouring of concrete, 'he Jrulcrum 36 ot the lever being higher than the pivot bolt 38 oit the connecting rod 39, the latter locks the whole device o n the toggle-joint principle.

After the concrete has been poured in the mold thus formed, and begins to harden, the operator merely raises the levers 37 of the device to approximately the position shown dotted in Fig. 3. This movement of the hand lever causes the beam members 23---2? X to slide horizontally in opposite directions, because of the pulling force at fulcrum 36 and the pushing of connecting' rod 39.. Consequently the parallel wall members 14-15 are spread away trom the wall and the collapsible core members 16 and 17 are sprung toward each other and the device is sprung away from all the newly former wall surfaces and can be moved along horizontally to make the next section of wall.

My invention is also applicable to corner construction ot walls and the device, as made for such places, is illustrated to the lett. in Fig. 1 and more vin detail in Figs. 6 and 7. Instead ofv straight frames connectedl by two or more beams I provide angularly arranged', spaced wall and core sections and only one operating beam and hand lever, all of similar construction to the parts already described. all the similar parts used in said corner frame illust ated in Figs. 1, 6 and 7 carrying'the same uumlfiers but with the exponent ta, to avoid confusion. The frame channels and adjustable beams` it will be noted', are in this case connected by vertical posts of angle iron the vertical posts iattened at their i horizontal parts.' The beam of the corner frame is preferably Ymade of two angle irons 23, 23. placed tion may, oit course, also bev used on thel straight wall frames.

To provide iior angular' wall ends registering Vapertures 41 are made in the lower end bers 14-15 and the core. The'angle of eachl board is lixed by a rod 44 pivotally secured with one end, as at 45, to the board,4 the other end ot the rod being slidable in a slot 47 of a bracket 46 fixed on the beam member 23 and having a thumb screw 4S adapted to engage the rod within the slot.- Having set the board or boards 43 at the desired angle, concrete is lilled in the acute-angle space thus formed under the board or boards.

In Fig. 8 I have shown how theY overlapping ianges ot the collapsible core channels 16-17 have clearances 49 and 50 respectively, for the respective bars 2O and 21 to slide into when the core is sprung together previous to removing the frame from a inished y wall section.

The operation of my device beingalready fully disclosed in the specification it is only necessary to call attention to the fact that with my device no eXtra tools are required and no loose,`special parts need b-e carried around.y each device being complete in itself and, if properl-y made, isV comparatively light and always easily set in place for the successive pourngs of concrete.

lhat I claim is;

1. In a deviceof the class described, having spaced walls and an intermediate collapsible core and adapted to receive a concrete filling between them, adjustable means between said core and the walls to permit iilling of concrete to a predetermined angular line. n

2. The structure speciiied in claim 1, said adjustable means' comprising a `vertically swingable partit-ion between each wall and the core, a removable hinge bar transversely arranged in aperturesrin and adjacent the bottom of the core and wall channels, a hinge member at the bottom end ot each partition and adapted to pivotally engage said bar1 and means pivotally secured to each partition, above its hinge, to set the same at any desired angle.

' The structure specified in claim 2, saidy means for holding the partition comprising a rod pivotally secured to the partition, a fixedk post on the beam slotted to slidably receive said rod and a set screw in the post to engage the rod` within. the slotted portiony of the post. e

In testimony whereof I affix my signature.

THEQDORE E. ERDMANN. 

